Johan Petro (born January 27, 1986) is a French professional basketball player of Guadeloupean descent, who plays for Mets de Guaynabo of the Baloncesto Superior Nacional (BSN). He was selected by the SuperSonics with the 25th overall pick in the 2005 NBA draft.
He was a key member of the French junior national team and played at the INSEP. In 2004, he won the French League title with Pau-Orthez. Petro has also represented the French national basketball team.